Reassign structured control statement registers.
SCSREG [srcreg[dstreg,[tmpreg,[extreg,]]]]
The SCSREG directive reassigns the registers used by structured control statement (SCS) directives. It is convenient for reclaiming default SCS registers when they are needed as application operands within a structured control construct. The srcreg is ordinarily the source register for SCS data moves. The dstreg is the destination register. The tmpreg is a temporary register for swapping SCS operands. The extreg is an extra register for complex SCS operations. With no arguments SCSREG resets the SCS registers to their default assignments.
SCSREG Y0,B
Reassign SCS source and destination registers.
OPT (MEX)